JPS55128995A - Subscriber connecting circuit having ground button and insulating fault indicator - Google Patents

Subscriber connecting circuit having ground button and insulating fault indicator

Info

Publication number
JPS55128995A
JPS55128995A JP3633480A JP3633480A JPS55128995A JP S55128995 A JPS55128995 A JP S55128995A JP 3633480 A JP3633480 A JP 3633480A JP 3633480 A JP3633480 A JP 3633480A JP S55128995 A JPS55128995 A JP S55128995A
Authority
JP
Japan
Prior art keywords
wire
resistor
circuit
subscriber line
ground
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP3633480A
Other languages
Japanese (ja)
Other versions
JPS646598B2 (en
Inventor
Rehinaa Rooberuto
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG
Original Assignee
Siemens AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Siemens AG filed Critical Siemens AG
Publication of JPS55128995A publication Critical patent/JPS55128995A/en
Publication of JPS646598B2 publication Critical patent/JPS646598B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M19/00—Current supply arrangements for telephone systems
    • H04M19/001—Current supply source at the exchanger providing current to substations
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/22—Arrangements for supervision, monitoring or testing
    • H04M3/26—Arrangements for supervision, monitoring or testing with means for applying test signals or for measuring
    • H04M3/28—Automatic routine testing ; Fault testing; Installation testing; Test methods, test equipment or test arrangements therefor
    • H04M3/30—Automatic routine testing ; Fault testing; Installation testing; Test methods, test equipment or test arrangements therefor for subscriber's lines, for the local loop
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q1/00—Details of selecting apparatus or arrangements
    • H04Q1/18—Electrical details
    • H04Q1/30—Signalling arrangements; Manipulation of signalling currents
    • H04Q1/38—Signalling arrangements; Manipulation of signalling currents using combinations of direct currents of different amplitudes or polarities over line conductors or combination of line conductors

Abstract

A subscriber line access circuit for use in a telecommunications system is disclosed. The subscriber line access circuit has a power supply bridge in the form of a first resistor inserted in the b-wire (ground potential side) of a subscriber line, a second resistor inserted in the a-wire (supply potential side) of the subscriber line, and a capacitor which bridges the two wires at the terminals of the two resistors on the sides thereof opposite to the respective potential sources. This supply bridge is coupled on the capacitor side with a two-to-four wire hybrid transformer for the two-wire/four-wire transition to the system, and includes an evaluating circuit which delivers an indicating signal when the subscriber actuates a ground key. A cutoff circuit is arranged in the power supply bridge in series with the first or the second resistor, or both, between such resistor and the winding of the hybrid transformer to which it, the resistor, as well as the evaluating circuit are connected. This cutoff circuit comprises a cutoff switch which is opened, with a delay, upon ground key actuation and closed when the ground key actuation is terminated.
JP3633480A 1979-03-23 1980-03-24 Subscriber connecting circuit having ground button and insulating fault indicator Granted JPS55128995A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2911517A DE2911517C2 (en) 1979-03-23 1979-03-23 Subscriber connection circuit with earth button and insulation fault indication

Publications (2)

Publication Number Publication Date
JPS55128995A true JPS55128995A (en) 1980-10-06
JPS646598B2 JPS646598B2 (en) 1989-02-03

Family

ID=6066265

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3633480A Granted JPS55128995A (en) 1979-03-23 1980-03-24 Subscriber connecting circuit having ground button and insulating fault indicator

Country Status (7)

Country Link
US (1) US4301334A (en)
EP (1) EP0017763B1 (en)
JP (1) JPS55128995A (en)
AT (1) ATE3801T1 (en)
DE (2) DE2911517C2 (en)
FI (1) FI74858C (en)
ZA (1) ZA801684B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007525863A (en) * 2003-05-30 2007-09-06 エーディーシー ディーエスエル システムズ，インコーポレイティド Power increase method in line-fed network element system

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2911584C2 (en) * 1979-03-23 1981-06-11 Siemens AG, 1000 Berlin und 8000 München Subscriber connection circuit with earth button actuation indication, high-resistance switchable supply and device for generating call signals
DE3035287A1 (en) * 1980-09-18 1982-04-22 Siemens AG, 1000 Berlin und 8000 München Telephone subscriber exchange circuit - uses transformer sec. circuit with two split windings interconnected via rectifying elements
FR2501940B1 (en) * 1981-03-11 1985-07-19 Trt Telecom Radio Electr LONGITUDINAL VOLTAGE LOOP DETECTOR
FR2502434A1 (en) * 1981-03-20 1982-09-24 Trt Telecom Radio Electr Consumption reduction circuit for subscriber line equipment - uses opto-coupler to switch MOS transistor to add resistor to circuit when false call occurs
DE3207318A1 (en) * 1982-03-01 1983-09-08 Siemens AG, 1000 Berlin und 8000 München SUBSCRIBER CONNECTION CIRCUIT WITH LOW-RESISTANT BRIDGE-FREE FOUNDATION RESISTORS AND DIFFERENT INDICATIONS THROUGH INDICATION CIRCUIT
DE3235085A1 (en) * 1982-09-22 1984-03-22 Siemens AG, 1000 Berlin und 8000 München LOOP CURRENT INPUT FOR A MARKER
US4593156A (en) * 1984-05-18 1986-06-03 Itt Corporation Grounded tip detector
DE3433330A1 (en) * 1984-09-11 1986-03-20 Siemens AG, 1000 Berlin und 8000 München Circuit arrangement to indicate the earthing of a wire of a subscriber line when the earth key is pressed
DE3541546A1 (en) * 1985-11-25 1987-05-27 Ant Nachrichtentech Arrangement for the implementation of an earth key function
AU623968B2 (en) * 1989-01-19 1992-05-28 Fujitsu Limited Earth detecting circuit
GB9104133D0 (en) * 1991-02-27 1991-04-17 Plessey Telecomm Remote line test facility
DE202006006221U1 (en) * 2006-04-13 2006-07-06 Lincoln Gmbh & Co. Kg Feed pump and seal assembly for this
DE102022100351A1 (en) 2022-01-10 2023-07-13 Phoenix Contact Gmbh & Co. Kg Connector with a device for detecting a leakage current, arrangement for forming a plug connection and method for detecting a leakage current in a connector

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3121775A (en) * 1959-12-23 1964-02-18 Bell Telephone Labor Inc Line insulation testing in telephone systems
GB1236897A (en) * 1969-06-18 1971-06-23 Sits Soc It Telecom Siemens Improvements in or relating to compensating circuits
US3715511A (en) * 1969-09-24 1973-02-06 Stromberg Carlson Corp Telephone pulsing circuit
DE2520975C3 (en) * 1975-05-10 1980-06-12 Elmeg Elektro-Mechanik Gmbh, 3150 Peine Circuit arrangement for detecting loop states in telephone systems
DE2547880C2 (en) * 1975-10-25 1981-09-24 Standard Elektrik Lorenz Ag, 7000 Stuttgart Circuit arrangement for recognizing the operating states of a subscriber line and for connecting and disabling calls in telephone exchanges

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007525863A (en) * 2003-05-30 2007-09-06 エーディーシー ディーエスエル システムズ，インコーポレイティド Power increase method in line-fed network element system

Also Published As

Publication number Publication date
ZA801684B (en) 1981-03-25
DE2911517C2 (en) 1981-07-09
DE3063730D1 (en) 1983-07-21
JPS646598B2 (en) 1989-02-03
FI74858C (en) 1988-03-10
EP0017763B1 (en) 1983-06-15
FI74858B (en) 1987-11-30
US4301334A (en) 1981-11-17
FI800891A (en) 1980-09-24
DE2911517B1 (en) 1980-09-11
ATE3801T1 (en) 1983-06-15
EP0017763A1 (en) 1980-10-29

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